INDUSTRY'S SMALLEST SIM/SMART-CARD INTERFACES OPERATE AT LESS THAN 1.5V
SUNNYVALE, CA—February 8, 2000—Maxim Integrated Products introduces the MAX1740/MAX1741 SIM/smart-card level translators that provide level shifting and ESD protection for subscriber identification module (SIM) and smart-card ports. These devices integrate two unidirectional level shifters for the reset and clock signals, a bidirectional level shifter for the serial data stream, and ±10kV ESD protection on all card contacts.
For maximum flexibility, the level shifters translate between any two logic voltages from 1.425V to 5.5V. These translators are ideal for interfacing between system controllers and plug-in cards with 1.8V, 2.5V, 3.3V, or 5V logic levels. To prolong battery life, quiescent current is a low 1µA and drops to only 0.1µA during shutdown. The MAX1740 includes a direct shutdown control pin to aid card insertion and removal, while the MAX1741 includes a system-side data driver to support microcontrollers without open-drain drivers. Both devices simplify power management by automatically shutting down when either the system power or card power supply is removed. These devices can be combined with the MAX1686H regulated charge pump, which provides 0V/3V/5V from a +3V supply to provide SIM/smart-card power.
The MAX1740EUB/MAX1741EUB come in very small 10-pin µMAX packages (half the area of an 8-pin SO and only 1.09mm high). The parts are screened for the extended-industrial temperature range (-40°C to +85°C). Prices start from $1.45 (1000-up, FOB USA). An evaluation kit (MAX1741EVKIT) is available to help speed designs.
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